The index is a modified market value-weighted index designed to reflect the performance of U.S. dollar-denominated, taxable bonds with favorable ESG ratings while applying extensive screens. The fund generally will invest at least 90% of its assets in the index and in investments that have economic characteristics that are substantially identical to the component securities of the index and may invest up to 10% of its assets in certain futures, options and swap contracts, cash and cash equivalents as well as in securities not included in the index. It is non-diversified.